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Finding the Fourth Proportional to 1,443.46, 2,165.46 and 577.78

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Solution

The fourth proportional to 1,443.46, 2,165.46 and 577.78 is: 866.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,443.46 : 2,165.46 = 577.78 : x
  2. Step 2: Convert to fraction form
    1,443.46/2,165.46 = 577.78/x
  3. Step 3: Cross multiply
    1,443.46x = 2,165.46 × 577.78
  4. Step 4: Simplify right side
    1,443.46x = 1,251,159.48
  5. Step 5: Solve for x
    x = 1,251,159.48/1,443.46
  6. Step 6: Final answer
    x = 866.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.